The biggest change to Call of Duty: Black Ops 2's Zombie gameplay comes in the form of its campaign mode. Titled Tranzit, this tosses you and up to three of your friends into the biggest world the team at Treyarch has ever created for Zombies. Your goal in Tranzit is simple: k!ll all the undead that you come across and leave a trail of bodies in your wake. You and your team jump between a number of locales along the way, doing what appears to be defensive stands and clearing them out before moving on to the next place. However, getting from place to place isn't a simple loading screen, but instead requires you to get there by foot or by bus. It's unclear whether or not you'll be able to steer the bus, but the first trailer makes it pretty clear you'll be defending yourself and perhaps even building barricades in order to survive the journey between survival spots.

You'll also have plenty to look out for while you're battling in the zombie-infested wasteland, as Tranzit now includes "buildables," something Treyarch describes as elements you can put together to do things like open up new parts of the world or make weapons. As for how the campaign ends? That's anyone's guess. Treyarch is playing whatever story it's inserting into Tranzit close to its chest, which fits with its strategy of letting the fans parse together the narrative through message boards and other online communities.

If Tranzit doesn't sound like your thing, if you're the type of person that just wants to hop in with friends and defend a single position, you'll be pleased to hear that Survival mode is returning with Black Ops 2. Playable either solo or with three friends, Survival offers the classic survival experience wherein you build defenses and hold out. The nitty-gritty details haven't been discussed, but the environments you play in are apparently custom-made takes on locations from the Tranzit campaign.

Cooperative play isn't for everyone, and while Black Ops 2 will feature a competitive multiplayer mode as well, Treyarch's also developing a new take on competitive play for Zombies called Grief. Internally the team at Treyarch likes to refer to Grief as "4z4," because unlike traditional competitive games both sides have to deal with a third party that wants their brains -- the Zombies. In Grief, your only goal is to have your team outlive the other, but, unlike every other Call of Duty mode you've ever played, you can't shoot other players. Instead you have to "grief" them and get the zombies to do the work for you. Treyarch's being disappointingly mum in regards to how "griefing" actually works, so for now we're left to speculate about how we'll be attempting to k!ll our friends come November.

If there's a rule or any other part of Zombies' three modes that you don't like, Treyarch wants you to tweak them and create your own using the Custom games feature -- a first for Zombies. You can live out your hardcore zombie fantasy and make it so only headshots k!ll, turn off magic items and set your starting round.

Previously, the Zombie portion of Treyarch's Call of Duty games felt like a distraction, a way to break up the multi-hour sessions with the competitive multiplayer. Black Ops 2 aims to change it into something on par with the multiplayer and campaign. This isn't just a mode, it's a series of modes buried within a game, a testament to Treyarch's dedication to the fans. Without their input and devotion, Zombies wouldn't exist as it does today.

The story takes place across two separate arcs, one recounting events in the 1980s, and the other following characters in the year 2025.

1980s
The 1980s story arc follows the exploits of Alex Mason, f!ghting in a proxy war in Angola whilst suffering from a disorder as a result of his brainwashing in Vorkuta. Viktor Reznov will reportedly return in this section of the game, and it has been suggested that his friendship with Mason will continue to be explored.

This portion of the game chronicles the rise of Raul Menendez, the primary antagonist of the game in the 2025 chapter.

Known locations in this section are Angola, Afghanistan, Panama and parts of Central America.

2025

In 2025, a cyberattack targets the Chinese economy, crippling the Chinese Stock Exchange. In retaliation for this, the Chinese government has banned the export of rare earth elements, sparking a "Second Cold War" between the United States and the People's Republic of China. During a Chinese invasion of Los Angeles, David Mason - the son of Alex Mason - and a team from the United States Navy Special Warfare Development Group must escort the American and French presidents to safety as they come under attack from automated weapons and Menendez's men.

In the time since the 1980s, Raul Menendez has styled himself as the leader of the Cordis Die, a populist faction hailed as the champions of victims of economic inequality. In his role as their leader, Menendez has taken control of the "keys" to the armed forces, hijacking the United States' automated weapons systems and turning them against their masters.

Meanwhile, it is revealed that Frank Woods has survived his encounter with Lev Kravchenko and escaped from Hanoi. He has taken refuge in a secret location known as "The Vault" and has anticipated Menendez's rise to prominence. Woods serves as the narrator for the 2025 story arc.

Known locations are Los Angeles, The Vault, Singapore, Yemen and Cayman Trench.

Black Ops 2 introduces a new game mode, Hardpoint. Players rush to the same place on the map and try to hold it for as long as possible until it moves. k!ll Confirmed returns from Modern Warfare 3, with the scoring system changed to push players to play the objective.
Wager Matches from the original Black Ops return, now known as Party Games.

Apparently the scorestreak system has been revamped to reward people that play the objectives in the objective-based gametypes... capping a flag on dom is worth way more to the scorestreak, planting the bomb in Search, picking up tags on k!ll Confirmed

The first details on Black Ops 2 map packs, how they will be made available and pricing has been revealed courtesy of a “Season Pass” page that went live on CallofDuty.com recently.

Players who want to get all of Black Ops 2′s four map packs at a discount can do so by purchasing a Black Ops 2 Season Pass. The season pass will be sold via GameStop, Best Buy and most likely online via the CallofDuty website for £35.00 ($50). Map packs will also be available individually at $14.99 each.

Call of Duty: Black Ops 2 Season Pass
THE ULTIMATE WAY TO GET MORE OF CALL OF DUTY: BLACK OPS 2.

4 EPIC DLC MAP PACKS – 1 GREAT PRICE AT $10 OFF*

Get 4 Call of Duty: Black Ops 2 downloadable content Map Packs, delivering a variety of new content, including Multiplayer and Zombies playable content.
Save $10, at discounted suggested retail price of £34.99*
Content expected to be available in 2013 – following the game’s launch on 11/13/12
Check for availability at your local Game Stop or Best Buy.
*Based on Season Pass suggested retail price of £34.99 and four DLC Map Packs at a suggested retail price of $14.99 each.
**Season Pass and DLC Map Packs may not be available on all platforms or in all territories. Pricing and release dates may vary by platform. Call of Duty: Black Ops 2 game required; sold separately.

Remember, all of Black Ops 2 DLC will be available exclusively on Xbox 360 for at least 30 days.

Official Season Pass details will be made available by Activision in the near future.

Trophy\achievement list. I'll put it in spoilers for those that don't want to see it because some of them relate to the story.

No Man Left Behind
Rescue Woods.
20
Gathering Storm
Investigate the jungle facility.
20
Shifting Sands
Gather intel on Raul Menendez from Mullah Rahmaan.
20
Driven by Rage
Take down Menendez and his operation.
20
Waterlogged
Gather information on Raul Menendez' suspected terrorist plot.
20
What Happens in Colossus...
Find the Karma weapon.
20
False Profit
Capture Manuel Noriega and bring him to justice.
20
Deep Cover
Capture Menendez.
20
Sinking Star
Interrogate Menendez.
20
Late for the Prom
Escort the president to the secure location in downtown LA.
50
death from Above
Stop Menendez once and for all.
50
Old Fashioned
Complete "Pyrrhic Victory", "Old Wounds", "Time And Fate", and "Suffer With Me" in Veteran.
50
Futurist
Complete all future levels in veteran.
50
Giant Accomplishment
Complete all challenges in Black Ops II.
10
Mission Complete
Complete all challenges in a level.
10
Just Gettin' Started
Complete 1 challenge in any level.
15
Singapore Sling
Successfully neutralize the SDC freighter at Keppel Terminal.
15
Desert Storm
Successfully escort the VIPs to safety.
15
Defender
Successfully defend FOB Spectre from incursion.
15
Black Ops II Master
Complete the campaign on Hardened or Veteran difficulty.
25
Art of War
Successfully a.ssassinate SDC Chairman Tian Zhao.
15
Blind Date
Successfully rescue HVI.
10
Family Reunion
There are two futures.
10
Hey Good Looking
Plastic surgery avoided
15
Showdown
A duel between rivals
15
Dirty Business
Listen and think before you shoot.
10
Ship Shape
Reinforcements on the way.
15
Dead or Alive
Jailor or executioner.
15
Ultimate Sacrifice
Only one can survive.
20
Good Karma
Crack the celerium worm.
20
High IQ
Collect all intel.
10
Back in Time
Use a future weapon in the past.
15
Man of the People
Stop the brutality inflicted by the PDF.
10
Gun Nut
Complete a level with customized loadout.
15
Ten K
Minimum score 10k in every mission
10
Welcome to the Club
Reach Sergeant (Level 10) in multiplayer Public Match.
50
Welcome to the Penthouse
Prestige once in multiplayer Public Match.
20
Big Leagues
Win 5 multiplayer League Play games after being placed in a division.
10
Trained Up
Win 10 multiplayer games while playing in Combat Training playlists.
10
Party Animal
Win 10 multiplayer games while playing in Party Games playlists.
75
Tower of Babble
In TranZit, obey the voices.
30
Don't Fire Until You See
In TranZit, have all doors opened without being set on fire.
5
The Lights Of Their Eyes
In Green Run, pacify at least 10 zombies with 1 EMP.
15
Undead Man's Party Bus
In TranZit, complete all additions to the bus in 1 game.
5
Dance On My Grave
In Green Run, acquire your Tombstone.
25
Standard Equipment May Vary
In TranZit, acquire 4 different equippable items in 1 game.
15
You Have No Power Over Me
In TranZit, defeat "him" without being attacked by "him".
10
I Don't Think They Exist
In TranZit, k!ll one of the denizens of the forest while it is latched onto you.
10
Fuel Efficient
In TranZit, use an alternative mode of transportation.
10
Happy Hour
In TranZit, buy 2 different perks before turning on the power.